Hey all, I've done a search and read a bunch about this... general consensus seems to be split 50/50 between "if you have quality parts, its a non-issue" and "it takes 30 seconds, always do it." My research on my components is inconclusive/positive-by-default. i.e., i havent heard any complaints about the components I bought, even though they are on the 'budget' side of the spectrum. my question is two-fold. 1. My BCG is a PSA Freedom complete BCG, and my barrel is Ballistic Advantage: PSA Freedom 5.56mm Tested Full Auto Bolt Carrier Group - 507608 Ballistic Advantage Modern Series 14.7" 5.56 NATO Lightweight Contour 1:7 Nitride AR-15 Barrel - Mid-Length - 1/2x28 BABL556012M Are these considered by most of you to be 'quality' and 'free of known issues?' 2. Shot in the dark, but anyone in the woburn area going to be at MassRifle tonight have a go/no-go gauge set they might want to bring to the club with them and let me use for those 30 seconds? Thanks all.